The water between Hawaii and Ensenada was not very rough at all, in fact, one day it was smooth as glass. The wind, however, was pretty strong throughout the cruise. One day it was so bad (50 mph) that we were not able to have one of our two days in Maui (we got to come back the first evening around 6pm), because the tender boats were not able to come along side the ship without really bad waves. We would say that the seas were rougher within the islands, yet not too bad. Everyone just looked like they had had a little too much to drink ;0)
If you have any more questions, just let us know!!!